Liquid dispensing valve



March 23, 1954 A. B. ROOD ET AL LIQUID DISPENSING VALVE Filed May 1 IN VEN TOR-s uqitarn ay 454 7205. 2000 BY A zu r 5. 0422 wgtaumo 21MPatented Mar. 23, 1954 .1.-.2,.67s,o1 1 iievmsgi s er ws "339.241 iatndgKel Te sslgnors in adding to :concrete; zmixes.-.certain.agmeasuredquantities of liquid air-entraining agents'..r iI his quid is addedto.the.mixrapproximat ly.:simu1-aneouslywithtthadumpingmf.theswaterpas.well fl fih ement... andands-gravel .into the ;concrete mixe .1; A eiectofithaingentionistoprovidea simply Q9. .t u t dtye;hish1ytef1cientiliquid dispensin 1Y wh ch contains tnoilrelatively.movable head fi ii lements rpr:. .plu and j core ,elements. .or

l itiona a1 .=@nd.a llbjfi l l itouwfialr. and. cor-- ass and: .snltatrlealsase; x

Another object of the rmyentiomdsntosproyide a va lyey thrpughgwnichmeasured quantities of iliidgqangbegdispepggd and wherein the quantitycan be varied quickly and conveniently.

Another,- iObj ect Lctoiprnvide .ajvalveamember including a flexibletubularelement-haying means for constricting spaced "po ions" thereof topermitfrieasuring of specific' 'diiaritities of the jiquidwhereinthe-mea'suring a can-be opez'fated-bysimple *h'a barranged-foreennection' toysgme 9bt eiit ms jA further objectof theinven an mproved type offlexible so which isparticularlyeda vicesof-'this' type.---

The above andpthe ebiettsian va t e of the vention will more fullyappear fromv the gollowing description in c'on'n ctign withcompanying'drawingswher n.

Fig. 1 is a front elevational view.

Fig. 2 is a side elevational view.

Fig. 3 is a sectional view through the tubular element in its expandedposition.

Fig. 4 is a sectional view through the tubular element in its collapsedposition.

Fig. 5 is a plan view of one of the tube constricting clamps.

Fig. 6 is a view, in a reduced scale, of another form of operatingmeans.

The device includes a body member 6 having ends 8 which are bentparallel to each other and through which extend short conduit couplingtubes III which may or may not be threaded at their outer ends dependingupon the type of conduit to whch they are to be connected. The couplingtubes ID are rigidly supported by the ends 8 of the body member 6.

Connected between the inner ends of the cou- 1 ..a'-r s ru ture suchlaisare :found in con- I b e W b --..Qar chkote Company, I nc.,

stdngeles.

l 'l l lica tion ltiayl, 1950-,iserism 1.3 'Qlaipls; (age-a,

plingztubes'..:lll.;is .;a. piece of flexible tubing l2. Thisttubingisciormed 0f twmsheets 14 of a-suitable flexible cmaterial suchasione ofthe many QQmmercialiplasticsllin usertoday. The edges of he:sheets:;li4ane united inQaflush or fiat relationship. i

In Fig. 4 there is shown an adhesive lBwhich .i iinsttheadjacentcfaces,ofathe.sheets along their longitudinal edges; .1:It-.-is:contemplated that j oinn -pf 4 .116.sheetssmayehe.saccomplished.with anadhesive vpry-by: heat-sealing or..-.a solvent in accordance withpractices.generallyiknownand de- PHdi -umnt h pe of:.p1astic.materialused.

' r pmpos djofstwo sectionsof fiatmaterial.

e ends of the tubeimaytbelsecured to the cou- My ar-.1a-weldedithereto,the.ends of-the bar ssien le gl ally beyond;said body member as shown inFig. 1, and the ban-20 extends across de of :body member, .6.

p 1 weenthe parallel arms 22 of 19 .5 pl. P334 whosmarms are vslidabl .1theiep szo s be grossvmembe of the ba e @9653?!" h. tms lzzh ve wash rs4 egross bards. a tinatflsewmd tothe in tbeetbe so.-.. nd-iby.means ofthe rin the clamp can be pulle tqrgqn'iptfess .the springs 26. When thering 28 and clamp 24 are released, the springs 26 will cause the bridgeof the clamp 24 to collapse the lower nd of the tube I2 between theclamp bridge and the cross bar member 20.

A second u clamp 30 straddles the tube 12 and body member 6 and has itsparallel arms 32 extending slidably through the ends of a movable crossbar member 34. The arms 32 have springs 36 thereon in the same manner asthe springs 26 mentioned above. The U clamp 30 has a ring 38 thereon inth same manner as the ring 28 on clamp 24.

The clamp 30 and its supporting cross bar member 34 are slidablelongitudinally of body member 36 and the plastic tube i2. As a resultvarious desired amounts of liquid can be trapped between the clamp 24and 3 when both clamps are released to permit them to collapse or closeunderlying portions of the tube [2.

The body member 6 is shown provided with a series of dimples 1 which areadapted to selectively receive a small projection 35 on the innercentral portion of the cross bar 34 to hold the upper clamp assembly inits desired vertically adjusted position.

One flat side of the body member 6 is provided with a series ofgraduations 40 which preferably are provided with suitable indiciaindicating fluid quantities such as ounces or cubic centimeters. Thispermits adjustment of the movable clamp 30 and entrapment of any desiredamount of liquid between the two clamps whereupon the lower clamp 24 canbe released to dispense'thejjamount of liquid.

The upper connector tube 10 can be connected by a pipe or piece offlexible tubingto a supply tank for a quantity of air entraining agentwhich is adapted to be fed in desired amounts to concrete mixes. Thelower connector element l can-be coupled to a flexible tube whichterminates at the entrance of a concrete mixer so that measuredquantities of the chemical airentraining agent can be introduced tothe'ingredients of a concrete mix at the time such ingredients,including water, are placed in the mixer.

The device is simple in structure and as stated above, it eliminatesconventional valves which would 'be subject to corrosive action of thechemicals and are more difficult to operate in a combination of thisgeneral type.

The device shown can be operated by hand. In-the position of Figs. 1 and2 the tube 12 will become filled with liquid from the supply tank. Thisis'due to the fact thatthe upper tube constricting clamp 30 is'held outto permit liquid to flow in while the lower clamp holds the tube in aconstricted position. The upper clamp can be" released to constrict theadjacent: portion of the tube and the lower clamp pulled out topermit'the entrapped measured quantity of liquid to flow to the mixer.

The clamps 24 and 30 are so constructed. that they can'beccnvenientlyconnected to some mechanical operating means which wouldfunction to permit the upper clamp 30 to close before the lower clamp 24is opened and also to permit the lower clamp to close before the up perclamp is again opened. This is indicated generally in Fig. 6 which showsa'lever 42 having central pivot 44 and having its ends connected byflexible linkage 46 to the rings Hand 38. There is sufiicient slack inthe flexible linkage 46 to permit the relative movements of the clamp 24and 30 described above.

It will of course be understood that various changes can be made in theform, details and proportions of the various parts without departingfrom the spirit of the invention.

We claim:

1. In a liquid dispensing valve, an elongated vertically disposed bodymember having a generally flat front face portion, a'flexible tubularelement extending along the body member and lying against the flat frontface portion, a pair of spaced tube constrictors carried by said bodymember, each of said constrictors including a 'Uj-shaped-clampflyingaboutthe tubular element and having its legs extending rearwardly ateach side of the body member, and the U-shaped clamps being equippedwith springs to press a transverse part of the tubular element againstthe body member to cut off flow through the tubular element.

2. The structure in claim 1, and one of the clamps being movable towardand away from the other and along said body and tubular element,itsspring creating sufficient pressure of the clamp against the tubularelement to retain the clamp in position.

3. In the liquid dispensing valve, a flexible tubular element adaptedfor connection to a liquid line, a pair of tube constricting devicesmounted at spaced points along said tubular element, springs foractuating said consricting devices, one of said devicesbeing movablealong the tubular element and toward andaway from the other constrictingdevices to permit varying of the amount of liquid trapped between them,

and the spring on themovable constricting device being operable toretain the constricting device in position on the tube. V

ASHTON B. ROOD. KELLY B. CARR.

References Citedin the file of this patent UNITED STATES PATENTS NumberName Date 143,907 Hyde Oct. 21, 1873 210,334 Kinsman Nov. 26, 18781,219,846 Nelson Mar. 20, 1917 1,432,882 Lobl Oct. 24, 1922 1,702,974MacDonald Feb. 19, 1929 1,876,988 Lormor Sept. 13, 1932 2,112,625Jackson Mar. 29, 1938 2,356,212 Burdett Aug. 22, 1944 FOREIGN PATENTSNumber Country Date 142,472 Austria of 1935

